package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.serializer.BeanContext;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotation.exception.AddressBookBusinessException;
import com.sky.annotation.exception.OrderBusinessException;
import com.sky.annotation.exception.ShoppingCartBusinessException;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.OrdersDTO;
import com.sky.dto.OrdersPageQueryDTO;
import com.sky.dto.OrdersPaymentDTO;
import com.sky.dto.OrdersSubmitDTO;
import com.sky.entity.*;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
     @Autowired
    private WeChatPayUtil weChatPayUtil;
     @Autowired
     private UserMapper userMapper;
     @Autowired
     private WebSocketServer webSocketServer;

    /*
    * 用户下单
    * */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //处理各种业务异常(地址簿为空,购物车数据为空)
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook == null){
            //抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        //查询当前用户的购物车数据
        Long userId = BaseContext.getCurrentId();

        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartlist = shoppingCartMapper.list(shoppingCart);
        if(shoppingCartlist == null || shoppingCartlist.size() == 0){
            //抛异常
            throw  new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //向订单插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);

        orderMapper.insert(orders);

        List<OrderDetail> orderDetailList = new ArrayList<>();
        //向订单明细表插入n条数据
        for (ShoppingCart cart : shoppingCartlist) {
            OrderDetail orderDetail = new OrderDetail();//订单明细
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());//设置当前订单明细关联的订单id
            orderDetailList.add(orderDetail);
        }

        orderDetailMapper.insertBatch(orderDetailList);
        //清空当前用户的购物车数据
        shoppingCartMapper.deleteByUserId(userId);
        //封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        /*JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );*/
        JSONObject jsonObject = new JSONObject();

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        //替代微信支付成功后的数据库订单状态更新,多定义一个方法进行修改
        Orders orders = orderMapper.getByNumber(ordersPaymentDTO.getOrderNumber());
        Long addressId = orders.getAddressBookId();
        AddressBook addressBook = addressBookMapper.getById(addressId);
        String address = addressBook.getDetail();
        orders.setAddress(address);
        orders.setPayStatus(Orders.PAID);//已支付
        orders.setStatus(Orders.TO_BE_CONFIRMED);//待接单
        orders.setCheckoutTime(LocalDateTime.now());//付款时间

        orderMapper.update(orders);

        //通过websocket向用户端浏览器推送信息 type orderId content
        Map map = new HashMap<>();
        map.put("type",1);//表示来单提醒 2 表示用户催单
        map.put("orderId",orders.getId());
        map.put("content","订单号:" + orders.getNumber());

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
        return vo;
    }
    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo*/

    public void paySuccess(String outTradeNo) {
        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
    }

    /*
    * 接收订单
    * */
    @Override
    public void confirm(OrdersDTO ordersDTO) {
        Long id= ordersDTO.getId();
        Orders orders = Orders.builder()
                .id(Long.valueOf(id))
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    /*
    * 拒绝订单
    * */
    @Override
    public void rejection(OrdersDTO ordersDTO) {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersDTO.getId());
        //订单的状态为2才可以拒单
        if(ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //支付状态
        Integer payStatus = ordersDB.getStatus();

        Orders orders = Orders.builder()
                .id(ordersDTO.getId())
                .status(Orders.CANCELLED)
                .rejectionReason(ordersDTO.getRejectionReason())
                .cancelTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);
    }

    /*
    * 取消订单
    * */
    @Override
    public void cancel(OrdersDTO ordersDTO) {
        Orders orders = Orders.builder()
                .id(ordersDTO.getId())
                .cancelReason(ordersDTO.getRejectionReason())
                .cancelTime(LocalDateTime.now())
                .status(6)
                .build();
        orderMapper.update(orders);
    }
    /*
    * 统计订单
    * */
    @Override
    public OrderStatisticsVO statistics() {
        Integer toBeConfirmed = 0;
        Integer confirmed = 0;
        Integer deliveryInProgress = 0;
        List<Long> Liststatus = orderMapper.querystatus();
        for (Long status : Liststatus) {
            if(status == 2){
                toBeConfirmed++;
            }else if(status == 3) {
                confirmed++;
            }else if(status == 4){
                deliveryInProgress++;
            }
        }
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /*
    * 派送订单
    * */
    @Override
    public void delivery(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        //查看订单状态
        if(ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = Orders.builder()
                .id(id)
                .status(Orders.DELIVERY_IN_PROGRESS)
                .build();
        orderMapper.update(orders);
    }

    /*
    * 完成订单
    * */
    @Override
    public void complete(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        //校验订单是否存在,并且状态为4
        if(ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = Orders.builder()
                .id(id)
                .status(Orders.COMPLETED)
                .build();
        orderMapper.update(orders);
    }

    /*
    * 查看订单详情
    * */
    @Override
    public OrderVO detail(Long id) {
        //根据id获取订单
        Orders orders = orderMapper.getById(id);
        //查询该订单对应的菜品
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orders.getId());

        //将订单封装到orderVO并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetails);
        return orderVO;
    }

    @Override
    public List<OrderVO> getByUserId() {
        Long userId = BaseContext.getCurrentId();
        List<OrderVO> orderVOList = (List<OrderVO>) orderMapper.getByUserId(userId);
        return orderVOList;
    }

    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        //部分订单状态,需要额外返回订单菜品信息,将Order转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);
        return new PageResult(page.getTotal(),orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        //需要返回订单菜品信息,自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();
        List<Orders> ordersList = page.getResult();
        if(!CollectionUtils.isEmpty(ordersList)){
            for (Orders orders : ordersList) {
                //将公共字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                String orderDishes = getOrderDishesStr(orders);

                //将订单菜品信息封装到orderVO中,并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /*
    * 根据订单id获取菜品详细信息
    * */
    private String getOrderDishesStr(Orders orders) {
        //查询订单菜品信息
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        //将每一条订单菜品信息拼接为字符串
        List<String> orderDishList = orderDetailList.stream().map(x ->{
            String orderDish = x.getName() + x.getNumber() + ",";
            return orderDish;
        }).collect(Collectors.toList());
        //将所有订单对应的菜品信息拼接在一块
        return String.join("",orderDishList);
    }

    @Override
    public PageResult history(int pageNum,int pageSize,Integer status) {
        //设置分页
        PageHelper.startPage(pageNum, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        //分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> list = new ArrayList<>();

        //查询出订单明细,并封装OrderVO进行响应
        if(page != null && page.getTotal() >0){
            for(Orders orders : page){
                Long orderId = orders.getId();//订单

                //查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(),list);
    }

    @Override
    public void repetition(Long id) {
        //查询当前订单信息
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);
        //将订单转化为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetails.stream().map(x ->{
            ShoppingCart shoppingCart = new ShoppingCart();
            //将原订单详情里面的菜品复制到购物车对象当中
            BeanUtils.copyProperties(x,shoppingCart,"id");
            shoppingCart.setUserId(BaseContext.getCurrentId());
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());
        //将购物车对象批量加入数据库中
        shoppingCartMapper.insertBatch(shoppingCartList);
    }
    /*
    * 用户查看订单详情
    * */
    @Override
    public OrderVO orderDetail(Long id) {
        // 根据id查询订单
        Orders orders = orderMapper.getById(id);

        // 查询该订单对应的菜品/套餐明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将该订单及其详情封装到OrderVO并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    /*
    * 用户取消订单
    * */
    @Override
    public void delete(Long id) {
        //根据id查询订单
        Orders orderDB = orderMapper.getById(id);

        //检验订单
        if(orderDB == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if(orderDB.getStatus() > 2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(orderDB.getId());
        //如果订单为待接单状态下取消,需要进行退款
        if(orderDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            orders.setPayStatus(Orders.REFUND);
        }
        //更新订单状态
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消订单");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /*
    * 客户催单
    * */
    @Override
    public void reminder(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        //校验订单是否存在,并且状态为4
        if(ordersDB == null){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Map map = new HashMap<>();
        map.put("type",2);//1表示来单提醒 2表示客户催单
        map.put("orderId",id);
        map.put("content","订单号:"+ordersDB.getNumber());
        //通过webSocketServer向客户端浏览器推送消息
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }
}
